From: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
This is needed for the KVMI_VCPU_SET_REGISTERS command,
without clearing the pending exception.
The KVMI_VCPU_SET_REGISTERS commmand allows the introspectiont tool to
override the kvm_regs structure of a specific vCPU. But in most cases
this is used to increment the program counter.
Signed-off-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 21 ++++++++++++++-------
include/linux/kvm_host.h | 2 ++
2 files changed, 16 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 10410ebda034..e973ffe04d54 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8970,16 +8970,23 @@ static void __set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
kvm_rip_write(vcpu, regs->rip);
kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED);
-
- vcpu->arch.exception.pending = false;
-
- kvm_make_request(KVM_REQ_EVENT, vcpu);
}
-int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs,
+ bool clear_exception)
{
- vcpu_load(vcpu);
__set_regs(vcpu, regs);
+
+ if (clear_exception)
+ vcpu->arch.exception.pending = false;
+
+ kvm_make_request(KVM_REQ_EVENT, vcpu);
+}
+
+int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
+{
+ vcpu_load(vcpu);
+ kvm_arch_vcpu_set_regs(vcpu, regs, true);
vcpu_put(vcpu);
return 0;
}
@@ -9386,7 +9393,7 @@ static int sync_regs(struct kvm_vcpu *vcpu)
return -EINVAL;
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) {
- __set_regs(vcpu, &vcpu->run->s.regs.regs);
+ kvm_arch_vcpu_set_regs(vcpu, &vcpu->run->s.regs.regs, true);
vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS;
}
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) {
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 23ab4932f7e7..49cbd175f45b 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -866,6 +866,8 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
void kvm_arch_vcpu_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs,
+ bool clear_exception);
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
void kvm_arch_vcpu_get_sregs(struct kvm_vcpu *vcpu,
